![node.js - new TypeError('Router.use() requires a middleware function but got a ' + gettype(fn)) - Stack Overflow node.js - new TypeError('Router.use() requires a middleware function but got a ' + gettype(fn)) - Stack Overflow](https://i.stack.imgur.com/acJTj.png)
node.js - new TypeError('Router.use() requires a middleware function but got a ' + gettype(fn)) - Stack Overflow
![TIL D-09 throw new TypeError('Router.use() requires a middleware function but got a ' + gettype(fn)) TIL D-09 throw new TypeError('Router.use() requires a middleware function but got a ' + gettype(fn))](https://img1.daumcdn.net/thumb/C176x176/?fname=https://k.kakaocdn.net/dn/ucz7Z/btqAQkJwKGc/NdSLHO5LA6oTlmZcd4j3yK/img.png)
TIL D-09 throw new TypeError('Router.use() requires a middleware function but got a ' + gettype(fn))
![javascript - Error: .post() requires callback functions but got a [object Undefined] not working - Stack Overflow javascript - Error: .post() requires callback functions but got a [object Undefined] not working - Stack Overflow](https://i.stack.imgur.com/U4QJ8.png)
javascript - Error: .post() requires callback functions but got a [object Undefined] not working - Stack Overflow
![javascript - Api : Express : throw new TypeError('Router.use() requires a middleware function but got a ' + gettype(fn)) - Stack Overflow javascript - Api : Express : throw new TypeError('Router.use() requires a middleware function but got a ' + gettype(fn)) - Stack Overflow](https://i.stack.imgur.com/XHJYX.png)
javascript - Api : Express : throw new TypeError('Router.use() requires a middleware function but got a ' + gettype(fn)) - Stack Overflow
![node.js - Route.post() requires a callback function but got a [object Undefined] (even though I have given the callback function) - Stack Overflow node.js - Route.post() requires a callback function but got a [object Undefined] (even though I have given the callback function) - Stack Overflow](https://i.stack.imgur.com/NS2it.png)
node.js - Route.post() requires a callback function but got a [object Undefined] (even though I have given the callback function) - Stack Overflow
![TypeError: Router.use() requires middleware function but got a Object | Express Node JS Error Solved - YouTube TypeError: Router.use() requires middleware function but got a Object | Express Node JS Error Solved - YouTube](https://i.ytimg.com/vi/0qEYCsFaeoo/hqdefault.jpg)
TypeError: Router.use() requires middleware function but got a Object | Express Node JS Error Solved - YouTube
![TypeError: Router.use() requires middleware function but got a Object | Express Node JS Error Solved - YouTube TypeError: Router.use() requires middleware function but got a Object | Express Node JS Error Solved - YouTube](https://i.ytimg.com/vi/DiQmP-PVI3A/hqdefault.jpg?sqp=-oaymwE8CKgBEF5IWvKriqkDLwgBFQAAAAAYASUAAMhCPQCAokN4AfABAfgB_AmAAtAFigIMCAAQARhNIFAoZTAP&rs=AOn4CLCq0rOsWfjspiAtjZqd4FtIvJd5pQ)
TypeError: Router.use() requires middleware function but got a Object | Express Node JS Error Solved - YouTube
![TypeError: Router.use() requires middleware function but got a Object | Express Node JS Error Solved - YouTube TypeError: Router.use() requires middleware function but got a Object | Express Node JS Error Solved - YouTube](https://i.ytimg.com/vi/at-PLdTGPq8/hqdefault.jpg?sqp=-oaymwEiCKgBEF5IWvKriqkDFQgBFQAAAAAYASUAAMhCPQCAokN4AQ==&rs=AOn4CLCf0PPRb2x0ePPPhZPkNqCSdCNWQQ)
TypeError: Router.use() requires middleware function but got a Object | Express Node JS Error Solved - YouTube
![Abusing Express Middleware. How we use middleware to break up our… | by Harry Martland | DailyJS | Medium Abusing Express Middleware. How we use middleware to break up our… | by Harry Martland | DailyJS | Medium](https://miro.medium.com/max/1142/1*30FkzX6K6DElABUxK8bBUA.png)